Derek, what do you consider big?
Here's pictures of my pond taken a short while ago.
So much snow that the floating dock is barely visible.
Here's a closer picture of the open hole from the diffuser. It's in approximately 10' of water, but the diffuser is about 3' beneath the surface. It's a single membrane diffuser. I am running about 3.5 psi of air to it, and bleeding off extra air from the compressor so I don't blow the membrane.
A picture with a wider view. I'd say the open water is about 30' to 40' diameter. The platform that the feeder is sitting on is 12' wide.
I drilled a hole in the ice right by the floating dock. There is about 10" of snow on top of the ice, about 3" of water/slush, and 13" of ice.
